Related Experiment Videos
Changes in strength over time among polio survivors
M G Klein1, J Whyte, M A Keenan
1Moss Rehabilitation Research Institute, Philadelphia, PA 19141, USA.
Archives of Physical Medicine and Rehabilitation
|August 16, 2000
Summary
Polio survivors experience significant muscle strength loss, particularly in upper extremities and lower extremity flexors, exceeding normal aging rates. This decline is not linked to age or time since polio.
Area of Science:
- Neurology
- Rehabilitation Medicine
- Musculoskeletal Health
Background:
- Post-polio syndrome (PPS) affects a significant number of polio survivors.
- Muscle weakness is a common and progressive symptom in PPS.
- Understanding the trajectory of muscle strength decline is crucial for managing long-term health.
Purpose of the Study:
- To longitudinally assess changes in muscle strength among polio survivors.
- To identify specific muscle groups affected by strength deterioration.
- To compare strength changes to normal aging processes.
Main Methods:
- A longitudinal study design was employed.
- One hundred twenty polio survivors participated.
- Isometric strength of 30 muscle groups was measured using a hand-held dynamometer over approximately 9 months.
Main Results:
- Significant strength deterioration was observed in upper-extremity muscles.
- Flexor muscles in the ankle, hip, and knee also showed strength decline.
- The rate of deterioration varied among muscles and was influenced by age, but not strongly by other factors.
Conclusions:
- Polio survivors exhibit muscle strength deterioration at a rate exceeding normal aging.
- Upper-extremity muscles and lower-extremity flexors are particularly vulnerable.
- Extensor (weight-bearing) muscles appear more preserved.